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<h1>Decommissioning</h1>




<p>This page shows you how to properly decommission a cluster.</p>











<ul id="markdown-toc">










<li><a href="index.html#before-you-begin">Before you begin</a></li>












<li><a href="index.html#destroy-the-juju-model">Destroy the Juju model</a></li>




<li><a href="index.html#cleaning-up-the-controller">Cleaning up the Controller</a></li>



























</ul>



<h2 id="before-you-begin">Before you begin</h2>
<p>This page assumes you have a working Juju deployed cluster.</p>

<blockquote class="warning">
  <div><strong>Warning:</strong> By the time you&rsquo;ve reached this step you should have backed up your workloads and pertinent data; this section is for the complete destruction of a cluster.</div>
</blockquote>




<h2 id="destroy-the-juju-model">Destroy the Juju model</h2>

<p>It is recommended to deploy individual Kubernetes clusters in their own models, so that there is a clean separation between environments. To remove a cluster first find out which model it&rsquo;s in with <code>juju list-models</code>. The controller reserves an <code>admin</code> model for itself. If you have chosen to not name your model it might show up as <code>default</code>.</p>

<pre><code>$ juju list-models
Controller: aws-us-east-2

Model       Cloud/Region   Status     Machines  Cores  Access  Last connection
controller  aws/us-east-2  available         1      2  admin   just now
my-kubernetes-cluster*    aws/us-east-2  available        12     22  admin   2 minutes ago
</code></pre>

<p>You can then destroy the model, which will in turn destroy the cluster inside of it:</p>

<pre><code>juju destroy-model my-kubernetes-cluster
</code></pre>

<pre><code>$ juju destroy-model my-kubernetes-cluster
WARNING! This command will destroy the &quot;my-kubernetes-cluster&quot; model.
This includes all machines, applications, data and other resources.

Continue [y/N]? y
Destroying model
Waiting on model to be removed, 12 machine(s), 10 application(s)...
Waiting on model to be removed, 12 machine(s), 9 application(s)...
Waiting on model to be removed, 12 machine(s), 8 application(s)...
Waiting on model to be removed, 12 machine(s), 7 application(s)...
Waiting on model to be removed, 12 machine(s)...
Waiting on model to be removed...
$
</code></pre>

<p>This will destroy and decommission all nodes. You can confirm all nodes are destroyed by running <code>juju status</code>.</p>

<p>If you&rsquo;re using a public cloud this will terminate the instances. If you&rsquo;re on bare metal using MAAS this will release the nodes, optionally wipe the disk, power off the machines, and return them to available pool of machines to deploy from.</p>

<h2 id="cleaning-up-the-controller">Cleaning up the Controller</h2>

<p>If you&rsquo;re not using the controller for anything else, you will also need to remove the controller instance:</p>

<pre><code>$ juju list-controllers
Use --refresh flag with this command to see the latest information.

Controller      Model  User   Access     Cloud/Region   Models  Machines    HA  Version
aws-us-east-2*  -      admin  superuser  aws/us-east-2       2         1  none  2.0.1  

$ juju destroy-controller aws-us-east-2 
WARNING! This command will destroy the &quot;aws-us-east-2&quot; controller.
This includes all machines, applications, data and other resources.

Continue? (y/N):y
Destroying controller
Waiting for hosted model resources to be reclaimed
All hosted models reclaimed, cleaning up controller machines
$ 
</code></pre>



















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